Spirit-level.



' =No. v7l 6,00l Patented Dec. l6, I902,

L. DESMARAIS.

SPIRIT LEVEL.

(Appl ication filed Sept. 5, 1902. (No Model.)

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UNITED STATES PATENT FFICE.

LOUIS DESMARAIS, OF NEW YORK, N. Y.

SPIRIT-LEVEL.

SPECIFICATION forming part of Letters Patent No. 716,001, dated December 16, 1902. Application filed September 5, 1902. Serial No. 122,195. (No model.)

To all whom it may concern:

Be it known that LLOUIs DESMARAIS, a subject of the King of Great Britain, and a resident of the city of New York, borough of Manhattan, in the county and State of New York,

have invented a new and Improved Spirit,

Level, of which the following is a full, clear, and exact description.

My invention relates to spirit-levels, my object being to produce a level in which the spirit-tube is adjustable and easily removed.

I will describe a spirit-level embodying my invention and then point out the novel features in the appended claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure l is a side elevation showing my invention in use. Fig. 2 is a central section through the spirit-tubes and their metallic connections, the section being taken substantially upon the line 2 2 of Fig. 1,. Fig. 3 is a section upon the line 3 3 ofFig. 1. Fig. i is a section substantially upon the line 4: 4 of Fig. 1. Fig. 5 is a plan of the spirit-level, showing the central tube adjusted at an abnormal angle relative to the frame; and Fig. 6 is a perspective View of a key for adjusting the metallic parts relatively to the frame.

The frame 1 is provided with a number of apertures 2, provided with shoulders 3. Fitted into these apertures is a metallic sleeve 4,

made, preferably, of brass and provided'with an opening 5. The bounding surface 6 of the.

4 is provided internally with a screw-thread.

7. Another sleeve 8, provided with an aperture 9, the aperture having a bevel 10, is provided for the purpose of engaging the sleeve 4. Each sleeve 8 is provided externally with a screw-thread 11, which engages the screwthread 7. The flanges 12 of the respective sleeves 8 are adapted to engage the shoulders 3 of the frame 1. Spirit-tubes 13, 14, 15, 16, and 17 are disposed within the sleeves 8. If one spirit-tube only is used, it may be placed directly across the aperture 9. If two spirittubes are employed, they may be placed parallel, as in Fig. 2, or at an angle with each other, as in Fig. 4. Each sleeve 4: and 8 is provided with a slot 18, whereby the sleeve -1nay be rotated. The key 20 (shown in Fig.

6) is provided with mutilated corners 21 for engaging the slots 18, thereby enabling the operator to turn either sleeve at will.

My invention is used as follows: The sleeves 4 and 8 are unscrewed and taken apart and are placed separately Within the aperture 2, the respective flanges of the sleeve inclosing the shoulders 3 of the frame. The sleeve containing the spirit tube ortubes is.now adj usted to the desired position, and the other sleeve is rotated by meansof the key until secured tightly in position. It will be noted that for the purpose of exact adjustment only the sleeve 4 need be rotated, the sleeve 8, which contains the spirit tube, not being moved by the key unless desired.

I find that this device is very efficient in operation. To change the angle of the spirit tube or tubes,-all that is necessary is to take the key and-loosen the sleeve 4, as by rotating the same half a revolution, then adjusting the sleeve containing the spirit tube or tubes to the desired angle, and-next tightening the other sleeve by means of the key.

From Figs. 2 and 4: it will be seen that the spirit-tubes are mounted Wholly Within the metallic sleeves and may be thus sold as articles of manufacture independently of the frame 1.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. A spirit-level, comprising a pair of revoluble sleeves, disposed concentrically to each other, one of said sleeves bein g provided with a spirit-tube, and means controllable at will for rotating one of said sleeves independently of the other.

2. A spirit-level,comprisinga sleeve threaded internally and provided with a flange, a second sleeve threaded externally and likewise provided with a flange, a spirit-tube disposed within said second sleeve, a frame provided with an aperture for engaging said sleeves, and means controllable at will for partially rotating said sleeves relatively to each other.

3. A spirit-level, comprising a frame, provided with an aperture having a plurality of shoulders, a sleeve adapted to fit said apercure and provided with a flange for engaging I one of said shoulders,said sleeve being threaded internally and provided with a slot Whereby the same may be rotated, a second sleeve threaded externally and provided with a flange for engaging another shoulder of said aperture, said second sleeve being further provided with a slot whereby it may be partially rotated, and a spirit-tube disposed within said second sleeve and movable there- 10 with.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

LOUIS DESMARAIS.

Witnesses:

JNO. M. BITTER, WALTON HARRISON. 

